Messages in this thread Patch in this message | | | Date | Thu, 11 May 2006 08:01:48 -0400 (EDT) | From | Steven Rostedt <> | Subject | Re: rt20 patch question |
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On Thu, 11 May 2006, Mark Hounschell wrote:
> Mark Hounschell wrote: > > This is with frame pointers on but doesn't look any more revealing to > me. After this one my network connection into the emulation was broken > BTW. And yes hard and soft irqs are threaded, preemptable-kernel, and > classic RCU > > BUG: scheduling while atomic: softirq-timer/1/0x00000100/15 > caller is schedule+0x33/0xf0 > [<b01041c9>] show_trace+0xd/0xf (8) > [<b01041e2>] dump_stack+0x17/0x19 (12) > [<b03112ec>] __schedule+0x517/0x95b (96) > [<b031188f>] schedule+0x33/0xf0 (28) > [<b014381f>] synchronize_irq+0x94/0xb9 (40) > [<b0143943>] disable_irq+0x31/0x35 (16) > [<f0a12715>] vortex_timer+0xa1/0x55b [3c59x] (72) > [<b01261d5>] run_timer_softirq+0x1ce/0x3de (56) > [<b012212c>] ksoftirqd+0x110/0x1cb (60) > [<b012f851>] kthread+0xc8/0xcc (32) > [<b0100e15>] kernel_thread_helper+0x5/0xb (268935196)
Nope, this trace is _a_lot_ better, the previous trace had a lot of garbage in it.
Anyway, I already figured out the problem from the last dump. Could you try the patch below to see if it fixes it.
> > I hope it was OK to add Ingo to the CC list? >
Yep, that's fine, in fact, he should have been added.
Try this patch to see if it fixes that bug.
-- Steve
Index: linux-2.6.16-rt20/kernel/sched.c =================================================================== --- linux-2.6.16-rt20.orig/kernel/sched.c 2006-05-10 16:23:15.000000000 -0400 +++ linux-2.6.16-rt20/kernel/sched.c 2006-05-10 16:28:31.000000000 -0400 @@ -3316,7 +3316,8 @@ void __sched __schedule(void) /* * Test if we are atomic. */ - if (unlikely(in_atomic())) { + if (unlikely(in_atomic()) && + (!hardirq_preemption || (preempt_count() & PREEMPT_MASK))) { stop_trace(); printk(KERN_ERR "BUG: scheduling while atomic: " "%s/0x%08x/%d\n", - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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